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Note 14 - Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
   

Warrants
(in thousands)

   

Weighted-

Average

Exercise

Price

 

Outstanding at December 31, 2021

    7,082     $ 1.63  

Warrants granted

    37,500     $ 0.53  

Outstanding at March 31, 2022

    44,582     $ 0.71